U. S. PATENT 960,539, … U. S. P.\TENT DESCRIPTION OF THE CALL AVIATION ENGINE By Henry L. Call XHIS is a regular opposed 2 and 4-cylinder■*■ engine of the usual 4-cycle type, watercooled, 6-inch bore by 554-inch stroke; the 2-cylinder engine developing 50-h.p., and the 4-cylinder engine developing 100-h.p., at…
Aeronautics
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